Epidermal growth factor receptor-targeted gelatin-based engineered nanocarriers for DNA delivery and transfection in human pancreatic cancer cells

AAPS J. 2008 Dec;10(4):565-76. doi: 10.1208/s12248-008-9065-0. Epub 2008 Nov 26.

Abstract

Type B gelatin-based engineered nanocarrier systems (GENS) have been used over the last several years as a non-condensing systemic and oral DNA delivery system. In this study, we have modified the surface of GENS with epidermal growth factor receptor (EGFR)-targeting peptide for gene delivery and transfection in pancreatic cancer cell lines. GENS were prepared by the solvent displacement method and the EGFR-targeting peptide was grafted on the surface using a hetero-bifunctional poly(ethylene glycol) (PEG) spacer. Plasmid DNA, encoding for enhanced green fluorescent protein (GFP), was efficiently encapsulated and protected from degrading enzymes in the control and surface-modified GENS. Upon incubation with EGFR over-expressing Panc-1 human pancreatic adenocarcinoma cells, the peptide-modified nanoparticles were found to be internalized efficiently by receptor-mediated endocytosis. Both quantitative and qualitative transgene expression efficiencies were significantly enhanced when plasmid DNA was administered with EGFR-targeted GENS relative to the control-unmodified gelatin or PEG-modified gelatin nanoparticle systems. Based on these preliminary results, EGFR-targeted GENS show tremendous promise as a safe and effective gene delivery vector with the potential to treat pancreatic cancer.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adenocarcinoma / genetics*
  • Cell Line, Tumor
  • Cell Survival
  • DNA / administration & dosage*
  • DNA / genetics*
  • Drug Carriers
  • Drug Delivery Systems / methods*
  • Electrophoresis, Agar Gel
  • ErbB Receptors / genetics*
  • Gelatin*
  • Gene Transfer Techniques
  • Genes, Reporter
  • Genetic Engineering / methods
  • Green Fluorescent Proteins / genetics
  • Humans
  • Microscopy, Electron, Scanning
  • Nanocapsules
  • Pancreatic Neoplasms / genetics*
  • Plasmids
  • Transfection

Substances

  • Drug Carriers
  • Nanocapsules
  • Green Fluorescent Proteins
  • Gelatin
  • DNA
  • ErbB Receptors